"I noticed a few reviews mentioning they used test strips in the water before and after and noticed no change. Thought I’d add to the discussion. Ok, sorry if this is gross for some but I used urine test strips after using these drops and I noticed a definite and clear rise in pH indicating these work! I know lemon for example will test acidic in water and then alkaline after being digested. Trust me, I deal with water chemistry for a living.